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Micro-grid network, method for controlling same and bidirectional converter for micro-grid

A bidirectional converter and micro-grid technology, applied in wind power generation, photovoltaic power generation, electrical components, etc., to optimize configuration, facilitate popularization and application, and achieve the effect of modular networking

Active Publication Date: 2013-08-07
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The present invention proposes a micro-grid networking and its control method and a bidirectional converter for micro-grid, aiming at solving the problems of modular networking of micro-grid and controllable flow and optimal scheduling of power in micro-grid

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  • Micro-grid network, method for controlling same and bidirectional converter for micro-grid

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Embodiment Construction

[0020] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0021] see figure 1 It is a schematic diagram of the composition and structure of the independent microgrid according to the embodiment of the present invention. It includes: the first microgrid converter a, the second microgrid converter b, the third microgrid converter c, the first photovoltaic grid-connected inverter 1, the second photovoltaic grid-connected inverter 2, load and microgrid monitoring center, the first microgrid converter a, the second microgrid converter b, the third microgrid converter c, the first photovoltaic grid-connected inverter 1. Both the second photovoltaic grid-connected inverter 2 and the load are connected to the transmission network topology of the microgrid, and the microgrid monitoring center is respectively connected to the converter a for the first microgrid and the converter a for the second microgrid. converter b, the ...

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Abstract

The invention discloses a micro-grid network, a method for controlling the same and a bidirectional converter for a micro-grid. The bidirectional converter for the micro-grid comprises a storage battery set, an inversion module, a DSP (digital signal processing) control system, a first inductor, a capacitor, a second inductor, a first interconnection switch and a second interconnection switch. A direct-current input end of the bidirectional converter for the micro-grid is connected with the energy storage battery set, and alternating current outputted by the inversion module is filtered by the first inductor and the capacitor, is connected to a local load by the first interconnection switch and is connected onto the micro-grid by the second inductor and the second interconnection switch. The micro-grid network, the method and the bidirectional converter have the advantages that active power and reactive power can controllably flow in the micro-grid, configuration of an energy storage system is optimized, the service life of the energy storage battery set is prolonged, and energy in various regions of the micro-grid is reasonably distributed; and existing power converter devices and technologies are sufficiently utilized, the modular network and a distributed access mode are implemented, the micro-grid can be expanded easily, and popularization and application of a micro-grid technology are facilitated.

Description

technical field [0001] The invention relates to the field of renewable energy distributed power generation micro-grids, in particular to a micro-grid networking and a control method thereof, and a bidirectional converter for the micro-grid. Background technique [0002] Renewable energy generation technologies such as photovoltaic power generation, wind power generation, biomass power generation, and ocean energy power generation have received extensive attention and applications. In islands, pastoral areas, small towns and other areas that lack electricity or have no electricity, the use of renewable energy such as solar energy for power generation has important social and practical significance for solving energy shortages and promoting the realization of energy conservation and emission reduction goals. In order to make full use of distributed renewable energy resources, micro-grid technology is used to connect distributed power sources and distributed loads, which not on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/00H02J3/32
CPCY02E10/763Y02E70/30Y02E10/566Y02E10/563Y02E10/766Y02E10/56Y02E10/76Y02P80/14Y02P80/20
Inventor 张先勇舒杰吴昌宏宋香荣周龙华
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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